
\begin{table}[!htbp] \centering 
  \caption{Effect of treatment on whether marijuana use is a serious problem today} 
  \label{tab:mar_serious} 
\begin{tabular}{@{\extracolsep{5pt}}lcc} 
\\[-1.8ex]\hline 
\hline \\[-1.8ex] 
 & \multicolumn{2}{c}{\textit{Dependent variable:}} \\ 
\cline{2-3} 
 & Wave 1 & Wave 2 \\ 
\\[-1.8ex] & (1) & (2)\\ 
\hline \\[-1.8ex] 
 Fox & 0.020 & 0.039 \\ 
  & (0.023) & (0.024) \\ 
  & & \\ 
 MSNBC & 0.006 & 0.017 \\ 
  & (0.024) & (0.025) \\ 
  & & \\ 
\hline \\[-1.8ex] 
Observations & 1,191 & 1,069 \\ 
R$^{2}$ & 0.001 & 0.002 \\ 
Adjusted R$^{2}$ & $-$0.001 & 0.0005 \\ 
\hline 
\hline \\[-1.8ex] 
\textit{Note:}  & \multicolumn{2}{r}{$^{*}$p$<$0.1; $^{**}$p$<$0.05; $^{***}$p$<$0.01} \\ 
\end{tabular} 
\end{table} 
